Figure 1.
Protocol stages. Stage 0—slow flat walking: duration 5 min, 0% gradient, speed 2.7 km/h. Stage ½—slow uphill walking: duration 3 min, 5% gradient, speed 2.7 km/h. Stage 1—fast uphill walking: duration 3 min, 8% gradient, speed 4.0 km/h.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.